Manual shifting fork clutch

Abstract

The utility model discloses a manual shifting fork clutch which comprises a swing frame which is connected to the upper end of a base in a rotating mode. The linkage ring is arranged in the middle of the swing frame; the driving arm is rotationally connected to the upper end of the swing frame, and the driving arm can slide relative to the swing frame; the locking frame is connected to the swing frame in a sliding manner; a limiting rod is arranged at the lower end of the locking frame; two locking columns are arranged on the base; the limiting rod is located between the two locking columns. Two stop rods are arranged at the lower part of the limiting rod; a spacing groove capable of containing the locking column is formed between the stop rod and the limiting rod. The linkage ring is driven in the form of an annular contact surface, so that the switching process is more stable and labor-saving; after the driving arm is folded and stored, collision of personnel is avoided; and the swinging arm can be driven to rotate only by manually pressing down / pulling up the driving arm, so that mistaken touch is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoist drive, and in particular relates to a manual shift fork clutch. Background Art

[0002] The auxiliary drive system of the elevator is mainly designed as a backup system in case of failure of the main drive system or power outage. Therefore, it is required to have a switching structure for connecting or disconnecting the main working part of the elevator.

[0003] The Chinese patent document with publication number CN217653187U discloses a fork-type drive device for auxiliary transmission, including a driving base body, an auxiliary transmission base, an auxiliary transmission reduction motor, a motor, a reducer, a fork, a liquid coupling and a coupling. The auxiliary transmission base is installed on one side of the driving base body, the motor and the reducer are installed on the driving base body, and the torque is transmitted through the liquid coupling; the auxiliary transmission reduction motor is installed on the auxiliary transmission base, the coupling is connected between the auxiliary transmission reduction motor and the reducer, and is mutually fitted with the fork, and the fork is swingably installed on the auxiliary transmission base to control the clutch of the coupling.

[0004] In the above-mentioned patent scheme, the shift fork is often relatively long. Although it can act as a lever to drive the coupling with less effort, the longer the extended length of the shift fork is, the more likely it is to collide during daily operation or inspection and maintenance, reducing the safety of personnel and equipment. In severe cases, the shift fork may be accidentally touched, causing the coupling connection state to switch, especially when the auxiliary transmission system is in operation, an accidental touch will cause a series of adverse consequences. Utility Model Content

[0005] In order to overcome the technical problem in the prior art that the shift fork driving the movement of the coupling is long and prone to accidental contact, one purpose of the utility model is to provide a manual shift fork clutch, which, by configuring the shift fork to be a swing frame and a drive arm that can be folded mutually, reduces the extension length of the shift fork while achieving labor-saving driving of the coupling, thereby improving the safety of equipment and personnel, and at the same time, a locking structure controlled by the drive arm is added to the swing frame to further prevent the swing frame from being accidentally touched.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a manual fork clutch, including a swing frame, which is rotatably connected to the upper end of the base; a linkage ring, which is arranged in the middle of the swing frame, and the linkage ring is used to switch the connection state of the auxiliary transmission system; a driving arm, which is rotatably connected to the upper end of the swing frame, and the driving arm can slide relative to the swing frame; a locking frame, which is slidably connected to the swing frame, and the driving arm is selectively connected to the locking frame in transmission; wherein a limiting rod is arranged at the lower end of the locking frame; two locking columns are arranged on the base; the limiting rod is located between the two locking columns; two stop rods are arranged at the lower part of the limiting rod; a spacing groove that can accommodate the locking column is formed between the stop rod and the limiting rod.

[0007] When the driving arm is arranged along the length direction of the swing frame, the driving arm as a power arm of a lever can switch the connection state of the auxiliary transmission system, which is more labor-saving; when the driving arm is rotated to be approximately perpendicular to the length direction of the swing frame, the extended length of the driving arm is retracted, which can reduce the collision between personnel and equipment and increase safety; at the same time, the spacing groove and the locking column cooperate to limit the rotation of the swing frame, and also reduce the risk of accidental touch.

[0008] Furthermore, the auxiliary transmission system includes a fixed coupling arranged on the transmission shaft and a sliding coupling slidably connected to the power shaft; the sliding coupling can be selectively plugged into the fixed coupling to achieve transmission; an annular driven groove is coaxially arranged on the outer wall of the sliding coupling; the linkage ring is located in the driven groove; the outer diameter of the driven groove is smaller than the inner diameter of the linkage ring.

[0009] In the prior art, the driven groove of a columnar structure or a crescent-shaped driving ring is used for switching. The inner wall of the driven groove is subjected to linear contact force, and the direction of the driving force and the sliding direction of the sliding coupling are no longer on the same axis, which has a certain resistance; the linkage ring and the inner wall of the driven groove are subjected to surface contact force, and the driving direction of the force is closer to the sliding direction of the sliding coupling. The force on the sliding coupling is more uniform, which is more labor-saving and also reduces the wear of the sliding coupling.

[0010] Optionally, a slot is provided in the middle of the upper end of the locking frame; an insert plate is provided at one end of the driving arm close to the locking frame; and the insert plate can be selectively inserted into the slot.

[0011] Optionally, a tension column is provided in the middle of the upper end of the locking frame; a pull hook is provided at one end of the driving arm close to the locking frame; and the tension column can selectively enter into the pull hook.

[0012] When the driving arm is arranged along the length direction of the swing frame, the locking frame can be driven to move by pressing down or lifting up, so that the spacing groove and the locking column are separated, and then the swing frame can be rotated to avoid accidental touch.

[0013] Specifically, a tension spring is arranged between the base and the locking frame; the elastic force of the tension spring is used to make the locking column enter the corresponding spacing groove.

[0014] Specifically, a positioning ring is rotatably connected to the base; the rotating axis of the positioning ring is coaxially arranged with the rotating axis of the swing frame; a tension spring seat is arranged at the lower part of the locking frame; a radial rod slidably connected to the tension spring seat is arranged on the outer wall of the positioning ring; the tension spring is arranged on the outer periphery of the radial rod, and the two ends are respectively arranged on the positioning ring and the tension spring seat.

[0015] Furthermore, the swing frame is provided with a rotating tube rotatably connected to the linkage ring; the locking frame is provided with a guide groove slidably connected to the rotating tube; the outer wall of the linkage ring is provided with a positioning column; the diameter of the positioning column is larger than the width of the guide groove; the locking frame is restricted to slide between the positioning column and the swing frame.

[0016] Furthermore, the swing frame includes two symmetrically arranged bending plates and a connecting column arranged at the upper ends of the two bending plates; a connecting groove is arranged at the lower part of the driving arm; the connecting column is slidably connected in the connecting groove; and the driving arm is located between the two bending plates.

[0017] The swing frame and the locking frame are both sheet metal structures, and the manufacturing difficulty and cost are relatively low, thereby reducing the overall manufacturing cost.

[0018] Preferably, a shell is provided on the outside of the swing frame; and the driving arm is located on the outside of the shell.

[0019] The power shaft and the transmission shaft are both located in the housing, which increases the safety of the equipment.

[0020] Furthermore, a transmission groove is provided at one end of the fixed coupling facing the sliding coupling; a transmission block is provided at one end of the sliding coupling facing the fixed coupling; the transmission block can be selectively inserted into the transmission groove; an axial sliding groove is provided on the sliding coupling; and a protruding key slidingly connected to the axial sliding groove is provided on the power shaft.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The linkage ring drives the sliding coupling to switch the connection state of the auxiliary transmission system in the form of an annular contact surface. The direction of its force is closer to the sliding direction of the sliding coupling, and the switching process is more stable and labor-saving.

[0023] 2. When the driving arm is unfolded, it acts as a lever, making the switching process more convenient and labor-saving; when the driving arm is folded and stored, the extended length is reduced to avoid collision with personnel and improve the safety of equipment and personnel;

[0024] 3. Add a locking structure. After the driving arm is unfolded, it is necessary to manually press / pull up the driving arm to drive the swing arm to rotate, further preventing accidental touch and increasing the stability and safety of the auxiliary transmission system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the parts explosion of the utility model;

[0027] Figure 3 It is a structural schematic diagram of the locking frame of the utility model;

[0028] Figure 4 It is a structural schematic diagram of the linkage ring of the utility model;

[0029] Figure 5 It is a schematic diagram of the structure of the auxiliary transmission system of the utility model being disconnected;

[0030] Figure 6 It is a structural schematic diagram of the auxiliary transmission system connection of the utility model;

[0031] Figure 7 It is a structural schematic diagram of the application scenario of the utility model.

[0032] In the figure: 1. base; 11. locking column; 2. swing frame; 21. rotating tube; 22. connecting column; 3. locking frame; 31. guide groove; 32. tension spring seat; 33. limit rod; 34. slot; 35. stop rod; 4. driving arm; 41. plug plate; 42. grip; 43. connecting groove; 5. linkage ring; 51. positioning column; 61. sliding coupling; 611. driven groove; 612. axial slide groove; 613. transmission block; 62. fixed coupling; 621. transmission groove; 71. positioning ring; 711. radial rod; 72. tension spring; 8. housing. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0034] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise specified and limited, the terms "setting", "installation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or two elements can be internally connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] See also Figure 1-Figure 7 A manual fork clutch comprises two bases 1 arranged between an auxiliary transmission system and an execution part of a hoist, a swing frame 2 whose lower ends are rotatably connected to the two bases 1, a locking frame 3 slidably connected to the swing frame 2, and a driving arm 4 rotatably connected to the upper end of the swing frame 2; the driving arm 4 can slide relative to the swing frame 2; a handle 42 is provided at one end of the driving arm 4 away from the swing frame 2.

[0038] The swing frame 2 includes two symmetrically arranged bending plates and a connecting column 22 arranged at the upper ends of the two bending plates; a connecting groove 43 is arranged at the lower part of the driving arm 4; the connecting column 22 is slidably connected in the connecting groove 43; the driving arm 4 is located between the two bending plates; the locking frame 3 is a U-shaped plate with an opening facing downward.

[0039] The auxiliary transmission system includes a fixed coupling 62 arranged on the transmission shaft and a sliding coupling 61 slidably connected to the power shaft; a transmission groove 621 is arranged at one end of the fixed coupling 62 facing the sliding coupling 61; a transmission block 613 is arranged at one end of the sliding coupling 61 facing the fixed coupling 62; the transmission block 613 can be selectively inserted into the transmission groove 621; an axial groove 612 is arranged on the sliding coupling 61; a protruding key slidably connected to the axial groove 612 is arranged on the power shaft; the rotation of the protruding key drives the axial groove 612 to rotate and then causes the sliding coupling 61 to rotate.

[0040] A linkage ring 5 is rotatably connected to the middle part of the swing frame 2; an annular driven groove 611 is coaxially arranged on the outer wall of the sliding coupling 61; the linkage ring 5 is located in the driven groove 611; the outer diameter of the driven groove 611 is smaller than the inner diameter of the linkage ring 5; a rotating tube 21 rotatably connected to the linkage ring 5 is arranged in the middle part of the bending plate; a guide groove 31 slidably connected to the rotating tube 21 is arranged on the locking frame 3; a positioning column 51 is arranged on the outer wall of the linkage ring 5; the diameter of the positioning column 51 is larger than the width of the guide groove 31; the locking frame 3 is restricted to slide between the positioning column 51 and the swing frame 2; a rotating column rotatably connected to the swing frame 2 is arranged on the base 1; the guide groove 31 slidably connected to the rotating column is arranged at the lower end of the locking frame 3.

[0041] A limiting rod 33 is provided at the lower end of the locking frame 3; two locking columns 11 are provided on the base 1; the limiting rod 33 is located between the two locking columns 11; two stop rods 35 are provided at the lower part of the limiting rod 33; a spacing groove capable of accommodating the locking column 11 is formed between the stop rod 35 and the limiting rod 33.

[0042] A slot 34 is provided in the middle of the upper end of the locking frame 3; a plug plate 41 is provided at one end of the driving arm 4 close to the locking frame 3; the plug plate 41 can be selectively inserted into the slot 34; a positioning ring 71 is rotatably connected to the base 1; the rotating axis of the positioning ring 71 is coaxially arranged with the rotating axis of the swing frame 2; a tension spring seat 32 is provided at the lower part of the locking frame 3; a radial rod 711 slidably connected to the tension spring seat 32 is provided on the outer wall of the positioning ring 71; a tension spring 72 is provided between the positioning ring 71 and the tension spring seat 32; the tension spring 72 is arranged on the outer periphery of the radial rod 711; the elastic force of the tension spring 72 is used to make the locking column 11 enter the corresponding spacing groove.

[0043] In other embodiments, it may also be that: a tension column is provided in the middle of the upper end of the locking frame 3; a hook is provided at one end of the driving arm 4 close to the locking frame 3; the tension column can selectively enter the hook; a spring is provided between the positioning ring 71 and the tension spring seat 32; the elastic force of the spring is used to make the locking column 11 enter the corresponding spacing groove.

[0044] A shell 8 is disposed outside the swing frame 2; the driving arm 4, the power shaft, and the transmission shaft are all located inside the shell 8, thereby increasing the safety of the equipment.

[0045] Use process: Pull out the driving arm 4 to make it level with the swing frame 2, press the driving arm 4 downward to make the plug plate 41 enter the slot 34, and further press the driving arm 4 downward to make the locking frame 3 slide relative to the swing frame 2. The sliding of the locking frame 3 drives the spacing groove to separate from the locking column 11, and the tension spring 72 stretches and accumulates force. While keeping the driving arm 4 pressed down, the driving arm 4 is rotated to drive the swing frame 2 to rotate, and the swing frame 2 rotates to drive the linkage ring 5 to rotate, and the linkage ring 5 rotates the sliding coupling 61 and the fixed coupling 62 to switch to the transmission state or disconnect the transmission state. Finally, release the driving arm 4, and the locking frame 3 makes the locking column 11 enter the spacing groove under the elastic force of the tension spring 72, and the locking frame 3 is locked. Then pull the driving arm 4 upward to separate the plug plate 41 from the slot 34, and rotate the driving arm 4 until it is flush with the upper end of the shell 8.

[0046] In other embodiments, the driving arm 4 is pulled upward to make the tension column enter the hook, and the driving arm 4 is pulled to drive the locking frame 3 to move, thereby separating the spacing groove from the locking column 11, and then switching is performed.

[0047] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A manual fork clutch, characterized in that: Included A swing frame, the swing frame is rotatably connected to the upper end of the base; A linkage ring, which is arranged in the middle of the swing frame and is used to switch the connection state of the auxiliary transmission system; A driving arm, the driving arm being rotatably connected to the upper end of the swing frame, and the driving arm being able to slide relative to the swing frame; A locking frame, wherein the locking frame is slidably connected to the swing frame, and the driving arm is selectively transmission-connected to the locking frame; Among them, a limiting rod is arranged at the lower end of the locking frame; two locking columns are arranged on the base; the limiting rod is located between the two locking columns; two stopping rods are arranged at the lower part of the limiting rod; and a spacing groove capable of accommodating the locking column is formed between the stopping rod and the limiting rod.

2. The clutch according to claim 1, characterized in that: The auxiliary transmission system includes a fixed coupling arranged on the transmission shaft and a sliding coupling slidably connected to the power shaft; the sliding coupling can be selectively plugged into the fixed coupling to achieve transmission; an annular driven groove is coaxially arranged on the outer wall of the sliding coupling; the linkage ring is located in the driven groove; the outer diameter of the driven groove is smaller than the inner diameter of the linkage ring.

3. The clutch according to claim 1 or 2, characterized in that: A slot is arranged in the middle of the upper end of the locking frame; an inserting plate is arranged at one end of the driving arm close to the locking frame; and the inserting plate can be selectively inserted into the slot.

4. The clutch according to claim 1 or 2, characterized in that: A tension column is arranged in the middle of the upper end of the locking frame; a pull hook is arranged at one end of the driving arm close to the locking frame; and the tension column can selectively enter into the pull hook.

5. The clutch according to claim 3, characterized in that: A tension spring is arranged between the base and the locking frame; the elastic force of the tension spring is used to make the locking column enter the corresponding spacing groove.

6. The clutch according to claim 5, characterized in that: A positioning ring is rotatably connected to the base; the rotating axis of the positioning ring is coaxially arranged with the rotating axis of the swing frame; a tension spring seat is arranged at the lower part of the locking frame; a radial rod slidably connected to the tension spring seat is arranged on the outer wall of the positioning ring; the tension spring is arranged on the outer periphery of the radial rod, and the two ends are respectively arranged on the positioning ring and the tension spring seat.

7. The clutch according to claim 1 or 2, characterized in that: The swing frame is provided with a rotating tube rotatably connected to the linkage ring; the locking frame is provided with a guide groove slidably connected to the rotating tube; the outer wall of the linkage ring is provided with a positioning column; the diameter of the positioning column is larger than the width of the guide groove; the locking frame is restricted to slide between the positioning column and the swing frame.

8. The clutch according to claim 1 or 2, characterized in that: The swing frame includes two symmetrically arranged bending plates and a connecting column arranged at the upper ends of the two bending plates; a connecting groove is arranged at the lower part of the driving arm; the connecting column is slidably connected in the connecting groove; and the driving arm is located between the two bending plates.

9. The clutch according to claim 1 or 2, characterized in that: A shell is arranged outside the swing frame; and the driving arm is located outside the shell.

10. The clutch according to claim 2, characterized in that: A transmission groove is provided at one end of the fixed coupling facing the sliding coupling; a transmission block is provided at one end of the sliding coupling facing the fixed coupling; the transmission block can be selectively inserted into the transmission groove; an axial sliding groove is provided on the sliding coupling; and a protruding key slidingly connected to the axial sliding groove is provided on the power shaft.

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